Hyrule Magic closes out on invdividual room

When playing my hack, I encountered a room that appeared to be corrupted (i.e. discolored and border issues), but the game did not crash if I went to the exist. Strangely, this corrupt room is the only one on my room while every other room does not appear to have any issue. Is the rom broken or can it be salvaged with a simple hex edit? This issue has never really happened to me before.